Breeding Horses: How to Get Better Pregnancy Rates With Cooled Semen
“Understanding the most important factors that lead to lowered fertility is of significant interest,” said Katila Terttu, DVM, MS, PhD, professor emerita of animal reproduction at the University of Helsinki, in Finland.
In a study of 1,098 mares bred with chilled shipped semen from 90 stallions, she and colleagues identified three factors that can help mare owners decide when to order semen and inseminate.
1. Give the mare ample opportunities to become pregnant.
“The mare needs to get enough opportunities to be bred,” Terttu said. “That’s at least three cycles during the breeding season. Start to breed early, with pregnancy checks around Day 16-17 so that no heats are missed if the mare did not
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